describes animals w/ body parts arranged in the same way on both sides of their body
radial symmetry
describes animals w/ body parts arranged in a circle around a central point; similar to a bicycle wheel
sessile
describes organisms, such as trees, that remain attached to one place during their lifetime
filter feeder
an organism that obtains food & oxygen by filtering it from the water from which it lives
collar cell
in sponges, the lining cells that help move through the sponge by beating of the flagella
regeneration
the ability of an organism to replace body parts; a type of asexual reproduction in which a whole new organism grows from just a part of the parent organism
hermaphrodite
an animal that produces sperm and egg
larva
a young organism that develops between egg and adult stages
cnidarian
a phylum of hollow-bidied animals w/ stinging cells
tentacles
the arm- like structures that surround the mouth of some organisms and help them to capture food
polyp
a vase shaped cnidarian that is usually sessile
medusa
a bell shaped cnidarian that is free swimming
free living
describes an organism that finds its own food and place to live w/ out depending on another organism; the opposite of a parasite
anus
an opening at the end of the digestive tract through which solid wastes leave the body
